Search Publications
Massive Star Formation in NGC 2074
Chu, You-Hua; Gruendl, Robert A.; Chen, C. -H. Rosie +2 more
Spitzer observations of the Large Magellanic Cloud (LMC) have revealed a large population of young stellar objects (YSOs), but complementary high-resolution images in the optical or near-IR wavelengths are still needed to resolve the multiplicity and immediate environments of the YSOs. The Hubble Space Telescope imaged the star-forming region NGC …
Cyclostrophic wind in the mesosphere of Venus from Venus Express observations
Piccialli, Arianna
The dynamics of Venus mesosphere was investigated by using observations from the Venus Express (VEx) mission. In the frame of this work, zonal thermal winds were derived from the VIRTIS (Visible and Infrared Thermal Imaging Spectrometer) and VeRa (Radio Science Experiment) temperature soundings by applying a special approximation of the thermal wi…
Infrared spectral evolution of carbon stars
Chen, Pei-Sheng; Shan, Hong-Guang; Yang, Xiao-Hong
We collected almost all Highly Processed Data Products (HPDP) of ISO SWS01 spectra for the Galactic visual carbon stars, infrared carbon stars, extreme carbon stars and carbon-rich proto-planetary nebulae (PPNs). Those infrared spectra are primarily analyzed and discussed. It is shown that either spectral shapes/peaks, or main molecular/dust featu…
Geology of Mars after the first 40 years of exploration
van Gasselt, Stephan; Pio Rossi, Angelo
The knowledge of Martian geology has increased enormously in the last 40 yr. Several missions orbiting or roving Mars have revolutionized our understanding of its evolution and geological features, which in several ways are similar to Earth, but are extremely different in many respects. The impressive dichotomy between the two Martian hemispheres …
The peculiar high-mass X-ray binary 1ES 1210-646
Palazzi, E.; Masetti, N.; Capitanio, F. +6 more
Using data collected with the BeppoSAX, INTEGRAL and Swift satellites, we report and discuss the results of a study on the X-ray emission properties of the X-ray source 1ES 1210-646, recently classified as a high-mass X-ray binary through optical spectroscopy. This is the first in-depth analysis of the X-ray spectral characteristics of this source…
Chemical and radiative transfer modelling of the ISO-LWS Fabry-Perot spectra of Orion-KL water lines
Barlow, M. J.; Swinyard, B. M.; Viti, S. +2 more
We present chemical and radiative transfer models for the many far-infrared ortho- and para-H2O lines that were observed from the Orion-KL region in high resolution Fabry-Pérot (FP) mode by the Long Wavelength Spectrometer (LWS) on board the Infrared Space Observatory (ISO). The chemistry of the region was first studied by simulating th…
Internal magnetic fields inferred from helioseismic data
Larson, T. P.; Antia, H. M.; Basu, S. +1 more
Measuring the internal solar magnetic fields and how they change over the course of a solar cycle is one of the key aims of helioseismology. We present the results of attempts to model the global mode splitting coefficients over solar cycle 23, assuming that the frequency splitting is only due to rotation and a large-scale magnetic field. The firs…
Moonlet induced wakes in planetary rings: Analytical model including eccentric orbits of moon and ring particles
Seiß, M.; Spahn, F.; Schmidt, Jürgen
Saturn's rings host two known moons, Pan and Daphnis, which are massive enough to clear circumferential gaps in the ring around their orbits. Both moons create wake patterns at the gap edges by gravitational deflection of the ring material (Cuzzi, J.N., Scargle, J.D. [1985]. Astrophys. J. 292, 276-290; Showalter, M.R., Cuzzi, J.N., Marouf, E.A., E…
Role of oxygen ions in the formation of a bifurcated current sheet in the magnetotail
Veltri, P.; Zimbardo, G.; Greco, A. +1 more
Cluster observations in the near-Earth magnetotail have shown that sometimes the current sheet is bifurcated, i.e., it is divided in two layers. The influence of magnetic turbulence on ion motion in this region is investigated by numerical simulation, taking into account the presence of both protons and oxygen ions. The magnetotail current sheet i…
The atmospheric temperatures over Olympus Mons on Mars: An atmospheric hot ring
Geminale, A.; Formisano, V.; Rinaldi, G. +1 more
We study the thermal fields over Olympus Mons separating seasons (northern spring and summer against southern spring and summer) and local time observations (day side versus night side). Temperature vertical profiles retrieved from Planetary Fourier Spectrometer on board Mars Express (PFS-MEX) data have been used. In many orbits (running north to …